Credits Authors David Morrison, PhD, NASA Ames Research Center Tobias Owen, PhD, University of Hawaii Addison Wesley Publishing Adam Black, PhD, Executive Editor Claire Masson, Sr. Producer Nancy Benton, Project Editor Jim Hufford, Associate Web Developer Steve Wright, Web Developer Christy Lawrence, Marketing Manager Joan Marsh, Production Editor Credits for Tutorials and Movies James Dove, PhD, Metropolitan State College of Denver Fran Bagenal, PhD, University of Colorado at Boulder Jeffrey Bennett, PhD, University of Colorado at Boulder Megan Donahue, PhD, Space Telescope Science Institute Erica Ellingson, PhD, University of Colorado at Boulder Kevin McLin, PhD, University of Colorado at Boulder Nick Schneider, PhD, University of Colorado at Boulder Mark Voit, PhD, Space Telescope Science Institute   Cadre Design, Ltd. Tutorials David Hegarty, Managing Director Senior Producer Chris Kemmett, Senior Programmer Bill Stern, Interactive Programmer Janet Saunders, Graphic Designer Melanie Halliwell, Graphic Designer Leigh Russell, Animator Acknowledgements for Tutorials and Movies Miriam Landesman QA4U Software Test Labs